Syria is the biggest humanitarian crisis of our time. 13.5 million Syrians need humanitarian aid, more than half the population has been forced from their homes. WHO provides lifesaving health services, including medicines and supplies | World Health Organization (WHO)

As Turkey and Russia announced a ceasefire in Idlib, Syria, a school courtyard that turned into a camp for displaced people celebrated, drowning out the sound of shelling in the distance. CNN's Arwa Damon reports on the continuing humanitarian crisis. https://cnn.it/2Tx1CEF | CNN Replay